基于FLAC~(3D)的边坡爆破临界振速的确定
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摘要
边坡爆破临界振速的确定是岩土爆破开挖过程中的关键问题。结合对永平铜矿高陡边坡稳定性的分析,介绍了基于FLAC3D的边坡爆破临界振速的确定方法。首先建立边坡静力分析模型,使模型达到自重作用下的平衡状态,其次通过施加不同爆破振动峰值速度的爆破过程来确定边坡破坏的爆破临界振速,之后可以得到最大段装药量与爆心至边坡坡脚距离之间的关系式。介绍了边坡破坏的判别准则和应用FLAC3D求解的流程。
The determination of the critical blast-inducing vibration velocity is crucial in soil slope excavation.This paper uses the stability analysis of the high steep rock slope of Yong Ping copper mine as an example and introduces the determining method of the critical blast-induce vibration velocity using FLAC3D software.First,static analysis model was built for the object of study to remain in its natural state with no influence from external force;and then,the critical blast-inducing vibration velocity of the slope was determined by imposing blasting operations with different peak velocity.By this means,the relation between maximum explosive load and the distance of explosion center to the toe of slope can be concluded by a single formula.At the same time,the paper reviews the principle for the determination of slope destruction and the application of FLAC3D.
The determination of the critical blast-inducing vibration velocity is crucial in soil slope excavation.This paper uses the stability analysis of the high steep rock slope of Yong Ping copper mine as an example and introduces the determining method of the critical blast-induce vibration velocity using FLAC3D software.First,static analysis model was built for the object of study to remain in its natural state with no influence from external force;and then,the critical blast-inducing vibration velocity of the slope was determined by imposing blasting operations with different peak velocity.By this means,the relation between maximum explosive load and the distance of explosion center to the toe of slope can be concluded by a single formula.At the same time,the paper reviews the principle for the determination of slope destruction and the application of FLAC3D.
引文
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[2]许名标,彭德红.岩质高陡边坡爆破降振技术研究[J].铁道建筑,2011(8):93-96.
[3]朱传云,卢文波,董振华.岩质边坡爆破振动安全判据综述[J].爆破,1997,14(2):13-17.
[4]曹孝君,吴青山,张继春,等.顺层岩质边坡的爆破振动控制标准试验研究[J].岩石力学与工程学报,2003,22(11):1924-1928.
[5]刘世波.多台阶开挖中的爆破振动传播规律研究[J].铁道建筑,2008(1):68-70.
[6]汪旭光,于亚伦.关于爆破震动安全判据的几个问题[J].工程爆破,2001,7(2):88-92.
[7]唐春海,于亚伦,王建宙,等.爆破地震动安全判据的初步探讨[J].有色金属,2001,53(1):1-3.
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